CN108899100B - A sealing structure for maintenance of a pebble bed high temperature reactor - Google Patents

Abstract

The invention relates to the technical field of sealing equipment for reactor equipment maintenance, and discloses a sealing structure for pebble bed high-temperature reactor equipment maintenance, which includes: a cylinder body, an opening is formed at the upper end of the cylinder body; a sealing end plate, the sealing end plate is arranged on the cylinder body The opening part of the body; the pressure sleeve, the pressure sleeve is arranged on the periphery of the cylinder and can reciprocate up and down along the axial direction of the cylinder, and the upper surface of the bottom end of the cylinder and the lower surface of the bottom end of the pressure sleeve are jointly constructed with a ring groove; A sealing component, the sealing component is arranged in the ring groove; and a tightening pressing component, the tightening pressing component is sleeved on the periphery of the cylinder and located on the upper part of the pressing sleeve, wherein, by tightening the tightening pressing component, the tightening pressing component It will prompt the pressure sleeve to move downward along the axial direction of the barrel and squeeze the sealing part to deform to seal the ring groove. The sealing structure has the advantage of better realizing the isolation of the internal and external pressure, atmosphere and dust of the pebble bed high temperature reactor device.

Description

A sealing structure for maintenance of a pebble bed high temperature reactor

technical field

The invention relates to the technical field of sealing equipment for reactor equipment maintenance, in particular to a sealing structure for pebble bed high temperature reactor equipment maintenance.

Background technique

The pebble bed high temperature gas-cooled reactor uses natural uranium as fuel, graphite as moderator, and helium as coolant. The loading and unloading device and the conveying conversion device of the pebble bed high temperature gas-cooled reactor all use a magnetic drive to realize the power transmission under the static helium seal. When the magnetic drive needs to be repaired or replaced, after removing the magnetic drive, it should be Measures are taken to isolate the interior of the device from the external atmosphere and prevent internal dust from spilling out. Therefore, it is necessary to use a maintenance-specific structure that is convenient for assembly and disassembly, and can realize the sealing and isolation of the inside and outside of the device.

Contents of the invention

(1) Technical problems to be solved

The purpose of the present invention is to provide a sealing structure for maintenance of a pebble bed high-temperature reactor device to solve the problem in the prior art that measures should be taken to isolate the inside of the device from the outside atmosphere and prevent the internal dust from spilling out after the magnetic drive is removed. question.

(2) Technical solution

In order to solve the above technical problems, the present invention provides a sealing structure for pebble bed high-temperature reactor maintenance, including: a cylinder, an opening is formed on the upper end of the cylinder; a sealing end plate, the sealing end plate is arranged on the The opening part of the cylinder; the pressure sleeve, the pressure sleeve is set on the periphery of the cylinder and can reciprocate up and down along the axial direction of the cylinder, the upper surface of the bottom end of the cylinder and the pressure sleeve The lower surface of the bottom end of the bottom end is jointly configured with an annular groove; a sealing part, the sealing part is arranged in the annular groove; and a screwing pressing part, the screwing pressing part is sleeved on the periphery of the cylinder and is located at the The upper part of the pressing sleeve, wherein, by tightening the tightening and pressing part, the tightening and pressing part will promote the downward movement of the pressing sleeve along the axial direction of the cylinder and press the sealing part to deform To block the ring groove.

Wherein, an annular sealing groove platform connected with the bottom end of the cylinder body and extending outward is provided at the bottom end of the cylinder body.

Wherein, the annular sealing groove platform includes a first annular body connected to the bottom end of the cylinder and extending outward, and a second annular body connected to the first annular body and extending outward , wherein the level of the upper surface of the first annular body is higher than the level of the upper surface of the second annular body.

Wherein, a protruding ring is configured at the bottom end of the pressure sleeve, and the protruding ring is sleeved on the periphery of the first annular body.

Wherein, the inner diameter of the protruding ring is the same as the outer diameter of the first annular body, and the outer diameter of the protruding ring is the same as the outer diameter of the second annular body.

Wherein, the protruding ring includes a horizontal part and a vertical extruding part connected with the horizontal part, wherein, the lower surface of the vertical extruding part, the outer surface of the first annular body and the The upper surfaces of the second annular body are jointly configured to form the annular groove with an opening facing the outside.

Wherein, the sealing component is made of flexible material.

Wherein, the sealing component includes one of a sealing strip, a sealing ring, and a sealing ring.

Wherein, a seal ring groove with an opening facing the central axis of the press sleeve is configured on the inner ring wall of the press sleeve, and a sliding sealing component is embedded in the seal ring groove.

Wherein, the tightening and pressing part includes a tightening nut.

(3) Beneficial effects

Compared with the prior art, the sealing structure provided by the present invention has the following advantages:

When the magnetic driver needs to be repaired or replaced, after the magnetic driver is removed, the sealing structure for maintenance of the pebble bed high temperature reactor device of the present application can be inserted into the base shaft hole in the pebble bed high temperature reactor device, and the Tighten the tightening and pressing part, the tightening and pressing part will gradually move downward along the axial direction of the cylinder, that is, move towards the direction of the pressure sleeve, when the lower end of the tightening and pressing part contacts the upper end of the pressure sleeve , continue to tighten the tightening pressing part, and the tightening pressing part will exert an axially downward extrusion force on the compression sleeve, and further, the lower end of the compression sleeve will squeeze under the action of the extrusion force. The pressure sealing component is deformed radially outward, so that the sealing component can seal the above-mentioned annular groove, and further, realize the sealing of the above-mentioned base shaft hole, so as to achieve the internal and external pressure of the spherical bed high-temperature reactor device. At the same time, it can also play a role in preventing internal dust from spilling out. In addition, the sealing structure for maintenance of the pebble bed high temperature reactor device of the present application also has the advantages of simple structure and convenient assembly and disassembly.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of a sealing structure for maintenance of a pebble bed high temperature reactor device according to an embodiment of the present application.

In the figure, 1: cylinder body; 11: upper surface; 12: annular sealing groove platform; 121: first annular body; 121a: upper surface of first annular body; 121b: outer surface; 122: second annular body body; 122a: upper surface of the second annular body; 2: sealing end plate; 3: pressure sleeve; 31: lower surface; 32: convex ring; 321: horizontal part; 322: vertical extrusion part; 322a: lower Surface; 33: sealing ring groove; 4: ring groove; 5: sealing part; 6: screwing and pressing part; 7: sliding sealing part; 200: base shaft hole.

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Example 1:

As shown in Figure 1, it schematically shows that the sealing structure for maintenance of the pebble bed high temperature reactor device includes a cylinder body 1, a sealing end plate 2, a pressure sleeve 3, an annular groove 4, a sealing part 5 and a tightening and pressing part 6 .

In the embodiment of the present application, the lower end of the cylinder body 1 is installed coaxially with the base shaft hole in the pebble bed high temperature reactor device. It is easy to understand that the cylinder body 1 is a hollow cylindrical structure.

An opening is formed at the upper end of the cylinder body 1 .

The sealing end plate 2 is arranged at the opening of the cylinder body 1 . That is to say, the setting of the sealing end plate 2 mainly plays the role of sealing, that is, it seals the opening of the upper end of the cylinder body 1 and plays the role of sealing.

It should be noted that the so-called "upper end" and "lower end" are all described according to the orientation shown in the figure, and do not represent the actual installation orientation. In actual installation, the so-called "upper end" and "lower end" can also be respectively as "left end" and "right end".

In a specific embodiment, the sealing end plate 2 can be integrally formed with the cylinder body 1 , and can also be fixed to the opening at the upper end of the cylinder body 1 by means of bolts or glue. It should be noted that as long as the sealing end plate 2 can realize the function of blocking and sealing the opening of the upper end of the cylinder body 1 , the specific fixing method of the sealing end plate 2 is not limited.

The pressure sleeve 3 is sleeved on the periphery of the cylinder 1 and can reciprocate up and down along the axial direction of the cylinder 1. The upper surface 11 of the bottom end of the cylinder 1 and the lower surface 31 of the bottom end of the pressure sleeve 3 share A ring groove 4 is formed.

The sealing member 5 is arranged in the ring groove 4 .

The tightening pressing part 6 is sleeved on the periphery of the cylinder body 1 and located on the upper part of the pressing sleeve 3, wherein, by tightening the tightening pressing part 6, the tightening pressing part 6 will push the pressing sleeve 3 along the The cylinder body 1 moves downward axially and presses the sealing member 5 to be deformed to seal the ring groove 4 . Specifically, when the magnetic drive (not shown in the figure) needs to be repaired or replaced, after the magnetic drive is removed, the sealing structure for maintenance of the pebble bed high temperature reactor device of the present application can be inserted into the pebble bed high temperature stack In the shaft hole 200 of the base body in the device, by tightening the above-mentioned tightening and pressing member 6, the tightening and pressing member 6 will gradually move downward along the axial direction of the cylinder body 1, that is, move toward the direction of the pressure sleeve 3, when After the lower end of the tightening pressing part 6 is in contact with the upper end of the pressing sleeve 3, continue to tighten the tightening pressing part 6, and the tightening pressing part 6 will exert an axially downward extrusion force on the pressing sleeve 3 Further, under the action of the extrusion force, the lower end of the compression sleeve 3 will press the sealing member 5 to deform radially outward, so that the sealing member 5 can seal the above-mentioned annular groove 4, further In this way, the above-mentioned axis hole 200 of the base body can be blocked, so as to achieve the purpose of isolating the inside of the ball bed high temperature reactor device from the outside atmosphere, and at the same time, it can also play a role in preventing the internal dust from spilling out. In addition, the sealing structure for maintenance of the pebble bed high temperature reactor device of the present application also has the advantages of simple structure and convenient assembly and disassembly.

It should be noted that when tightening the above-mentioned tightening pressing member 6, it can be stipulated that "clockwise rotation is tightening", "counterclockwise rotation is loosening", or "counterclockwise rotation is tightening", "clockwise rotation For unscrewing".

In one embodiment, in order to ensure the overall structural strength of the sealing structure for maintenance of the pebble bed high temperature reactor device, the above-mentioned cylinder body 1, sealing end plate 2, pressure sleeve 3 and tightening and pressing parts 6 can all be made of stainless steel or carbon steel.

As shown in Figure 1, in order to further optimize the cylinder 1 in the above-mentioned technical solution, on the basis of the above-mentioned technical solution, a The annular sealing groove platform 12. It should be noted that the arrangement of the annular sealing groove platform 12 can exert a pressing effect on the sealing member 5 , so that the sealing member 5 can be deformed and the sealing of the annular groove 4 can be realized.

As shown in Figure 1, in order to further optimize the annular sealing groove platform 12 in the above technical solution, on the basis of the above technical solution, the annular sealing groove platform 12 includes a The first annular body 121 and the second annular body 122 connected to the first annular body 121 and extending outward, wherein the upper surface 121a of the first annular body 121 is located at a level higher than that of the second annular body 121. The horizontal plane where the upper surface 122a of the annular body 122 is located. It is easy to understand that the cross-sectional shape jointly formed by the first annular body 121 and the second annular body 122 is similar to a "stepped shape".

In a preferred embodiment, a protruding ring 32 is configured at the bottom end of the pressing sleeve 3 , and the protruding ring 32 is sleeved on the periphery of the first annular body 121 . That is to say, the inner surface of the protruding ring 32 is in contact with the exposed outer surface of the first annular body 121 .

It should be noted that, when the tightening degree of the tightening pressing part 6 reaches the upper limit, the pressing degree of the bottom of the protruding ring 32 against the sealing part 5 also reaches the maximum, and at this time, the sealing part 5 The outward deformation is also maximized, so that a better sealing of the ring groove 4 can be achieved. Further, the sealing of the base shaft hole 200 is realized.

In a preferred embodiment, the inner diameter of the protruding ring 32 is the same as the outer diameter of the first annular body 121 , and the outer diameter of the protruding ring 32 is the same as the outer diameter of the second annular body 122 . In this way, by making the inner diameter of the protruding ring 32 the same as the outer diameter of the first annular body 121, the inner contour surface of the protruding ring 32 can be well matched with the outer contour surface of the first annular body 121. At the same time, by making the outer diameter of the protruding ring 32 the same as the outer diameter of the second annular body 122, it is convenient for the sealing structure for maintenance of the pebble bed high temperature reactor to be smoothly inserted into the pebble bed high temperature reactor. In the shaft hole 200 of the base body, it is avoided that the outer diameter of the convex ring 32 is inconsistent with the outer diameter of the second annular body 122, resulting in positional interference, resulting in the inability to be smoothly inserted into the shaft hole 200 of the base body in the pebble bed high temperature reactor device Case.

As shown in Figure 1, in order to further optimize the protruding ring 32 in the above technical solution, on the basis of the above technical solution, the protruding ring 32 includes a horizontal part 321 and a vertical extrusion part 322 connected with the horizontal part 321, Wherein, the lower surface 322a of the vertical extruding portion 322, the outer surface 121b of the first annular body 121 and the upper surface 122a of the second annular body 122 are jointly configured to form the above-mentioned annular groove 4 with an opening facing outward. It is easy to understand that the arrangement of the above-mentioned annular groove 4 mainly plays the role of accommodating the sealing member 5, and since the opening of the annular groove 4 faces outward, that is, towards the inner hole wall of the base shaft hole 200, when the above-mentioned protruding ring When the vertical extrusion part 322 of 32 is pressed against the sealing member 5, the sealing member 5 will be deformed radially outward, and the deformed sealing member 5 will be tightly connected to the inner hole wall of the shaft hole 200 of the base body. contact, so as to realize the sealing of the shaft hole 200 of the base body.

In a preferred embodiment, the sealing member 5 is made of flexible material. Specifically, the flexible material can be rubber or silicone.

In one embodiment, the sealing component 5 includes one of a sealing strip, a sealing ring, and a sealing ring. Specifically, when the sealing member 5 is a sealing strip, it only needs to wrap the sealing strip around the above-mentioned annular groove 4 once. If the sealing component 5 is a sealing ring or a sealing ring, it only needs to be sleeved on the periphery of the first annular body 121 .

In addition, the sealing component 5 can also be a metal C-shaped ring. It should be noted that the cross-sectional shape of the metal C-shaped ring is C-shaped. After the vertical extrusion portion 322 in the above-mentioned protruding ring 32 is squeezed to the upper part of the metal C-shaped ring, the metal C-shaped ring will The C-shaped cross-sectional shape is deformed, that is, the C-shaped cross-sectional shape is deformed in a flat-width direction.

It should be noted that, in order to ensure firm positioning of the sealing ring or the sealing ring, the inner diameter of the sealing ring or the sealing ring may be slightly smaller than the outer diameter of the first annular body 121 .

As shown in Figure 1, in the embodiment of the present application, a sealing ring groove 33 with an opening facing the central axis direction of the pressing sleeve 3 is configured on the inner ring wall of the pressing sleeve 3, and a sealing ring groove 33 is embedded in the sealing ring groove 33. A sliding sealing member 7 is provided. It should be noted that the sliding sealing member 7 can reciprocate and slide up and down along the axial direction of the cylinder body 1 with the pressure sleeve 3, so as to realize the sliding seal between the pressure sleeve 3 and the cylinder body 1. It can be seen that the sliding sealing member 7 The arrangement of the pressure sleeve 3 and the cylinder body 1 has enhanced the sealing performance between the pressure sleeve 3 and the cylinder body 1. Further, on the basis of the above-mentioned sealing member 5, the overall sealing performance of the sealing structure for maintenance of the pebble bed high temperature reactor device has been further enhanced. The separation of internal and external pressure, atmosphere and dust of the pebble bed high temperature reactor is well realized.

In a specific embodiment, the tightening and pressing part 6 includes a tightening nut. Specifically, the inner surface of the tightening nut is configured with external threads, and the outer surface of the cylinder body 1 is configured with internal threads, or the inner surface of the tightening nut is configured with internal threads, and the outer surface of the cylinder body 1 is configured with internal threads. Constructed with external threads.

In summary, when the magnetic drive needs to be repaired or replaced, after the magnetic drive is removed, the sealing structure for maintenance of the pebble bed high temperature reactor device of the present application can be inserted into the base shaft of the pebble bed high temperature reactor device In the hole 200, by tightening the above-mentioned tightening and pressing part 6, the tightening and pressing part 6 will gradually move downward along the axial direction of the cylinder body 1, that is, move toward the direction of the compression sleeve 3, when the tightening and pressing part After the lower end of 6 is in contact with the upper end of the pressing sleeve 3, continue to tighten the tightening pressing part 6, and the tightening pressing part 6 will exert an axially downward extrusion force on the pressing sleeve 3, further, the Under the action of the extrusion force, the lower end of the compression sleeve 3 will squeeze the sealing member 5 to deform radially outward, so that the sealing member 5 can realize the sealing of the above-mentioned ring groove 4, and further realize the sealing of the above-mentioned ring groove 4. The sealing of the shaft hole 200 of the base body achieves the purpose of isolating the inside of the ball bed high temperature reactor device from the outside atmosphere, and at the same time prevents the internal dust from spilling out. In addition, the sealing structure for maintenance of the pebble bed high temperature reactor device of the present application also has the advantages of simple structure and convenient assembly and disassembly.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (6)

1. The utility model provides a ball bed high temperature reactor device seal structure for maintenance which characterized in that includes:

a cylinder configured with an opening at an upper end thereof;

the sealing end plate is arranged at the opening part of the cylinder body;

the pressing sleeve is sleeved on the periphery of the barrel and can slide up and down in a reciprocating manner along the axial direction of the barrel, and an annular groove is formed on the upper surface of the bottom end of the barrel and the lower surface of the bottom end of the pressing sleeve;

a sealing member disposed within the ring groove; and

the screwing pressing component is sleeved on the periphery of the barrel and positioned at the upper part of the pressing sleeve, and the screwing pressing component can drive the pressing sleeve to move downwards along the axial direction of the barrel and extrude the sealing component to deform so as to seal the annular groove;

the bottom end of the cylinder body is provided with an annular sealing groove platform which is connected with the bottom end of the cylinder body and extends towards the outer side;

the annular sealing groove table comprises a first annular body connected with the bottom end of the cylinder and extending towards the outside and a second annular body connected with the first annular body and extending towards the outside, wherein the horizontal plane of the upper surface of the first annular body is higher than the horizontal plane of the upper surface of the second annular body;

a convex ring is formed at the bottom end of the pressing sleeve and sleeved on the periphery of the first annular body;

the convex ring comprises a horizontal part and a vertical pressing part connected with the horizontal part, wherein the lower surface of the vertical pressing part, the outer side surface of the first annular body and the upper surface of the second annular body are jointly formed into the ring groove with an opening facing outwards.

2. The seal structure for pebble bed high temperature reactor installation maintenance according to claim 1, wherein an inner diameter of the convex ring is the same as an outer diameter of the first annular body, and an outer diameter of the convex ring is the same as an outer diameter of the second annular body.

3. The seal structure for pebble bed high temperature reactor equipment maintenance according to any one of claims 1 to 2, wherein a material for manufacturing the seal member is a flexible material.

4. The seal structure for pebble bed high temperature reactor equipment maintenance according to claim 3, wherein the seal member comprises one of a seal strip, a seal ring and a seal ring.

5. A sealing structure for pebble bed high temperature reactor equipment maintenance according to claim 1, wherein a sealing ring groove opened in a central axis direction of the pressure sleeve is formed in an inner annular wall of the pressure sleeve, and a sliding seal member is fitted into the sealing ring groove.

6. The sealing structure for repairing a pebble bed high temperature reactor apparatus according to claim 1, wherein the tightening pressing member comprises a tightening nut.